Murkfiend Liege

Creature — Horror    (CMC:5)

Other green creatures you control get +1/+1. Other blue creatures you control get +1/+1. Untap all green and/or blue creatures you control during each other player's untap step.

231 C13 • ENCarl Critchlow

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Legal in: Modern,Lorwyn-Shadowmoor Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Classic,Singleton 100,Commander

Oracle Text (click to copy):

Murkfiend Liege {2}{G/U}{G/U}{G/U} Creature — Horror Other green creatures you control get +1/+1. Other blue creatures you control get +1/+1. Untap all green and/or blue creatures you control during each other player's untap step. 4/4

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8/1/2008
The abilities are separate and cumulative. If another creature you control is both of the listed colors, it will get a total of +2/+2.
8/1/2008
All your green and/or blue creatures untap during each other player's untap step. You have no choice about what untaps. Those creatures untap at the same time as the active player's permanents.
8/1/2008
During each other player's untap step, effects that would otherwise cause your green and/or blue creatures to stay tapped don't apply because they only apply during *your* untap step. For example, if you control Nettle Sentinel (a green creature that says "Nettle Sentinel doesn't untap during your untap step"), you untap it during each other player's untap step.
8/1/2008
Multiple Murkfiend Lieges are redundant when it comes to the untap effect. You can't untap your permanents more than once in a single untap step.

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